  * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: "Microsoft YaHei", sans-serif;
            background-color: #fff;
            color: #333;
        }

        header {
            background-color: #0b3d5d;
            padding: 5px 20px;
        }

        .navBar {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .titleLeft a,
        .titleRight a {
            color: #fff;
            text-decoration: none;
            font-size: 12px;
            margin-right: 15px;
        }

        .sub-nav {
            background-color: #f8f9fa;
            padding: 10px 20px;
            display: flex;
            align-items: center;
        }

        .titleLink2 {
            color: black;
            line-height: 50px;
            text-decoration: none;
            margin-right: 20px;
            font-family: Arial, Helvetica, sans-serif;
        }

        .titleLink2 span {
            color: paleturquoise;
            vertical-align: middle;
        }


        .sub-nav a {
            text-decoration: none;
            color: #333;
            margin-right: 15px;
            font-size: 14px;
        }  

        /* 轮播图 */
        .banner {
            width: 100%;
            height: 300px;
            background: url("https://picsum.photos/1920/300") center/cover no-repeat;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 24px;
            font-weight: bold;
            text-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
        }

        .container {
            max-width: 1200px;
            margin: 30px auto;
            padding: 0 20px;
        }

        .section-title {
            text-align: center;
            font-size: 20px;
            margin-bottom: 20px;
            font-weight: bold;
        }

        .video-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }

        .video-item img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: 4px;
        }

        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .recommend-item img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: 4px;
        }
       